'Pretty Little Liars' Diego Boneta's song 'Siempre Tu' in a sexy scene with Spencer

Diego Boneta is the newest guy of "Pretty Little Liars." He previously told Zap2it a little about his character and also what he likes to do for fun in the summertime. But now he's back with more dirty details on Alex Santiago, the newest love interest for one of our "Liars." "Alex is a pretty down-to-earth guy. He plays tennis professionally and he works part-time at the country club ... He's pretty much a normal guy," Diego tells us. So how does he factor into the world of the "Pretty Little Liars?" "He meets Spencer at the country club and at first it's kind of a forbidden love kinda thing because they're not at the same level socially and there's some pressure with Spencer and her dad. But Spencer follows her heart and things start getting a bit more intense with Alex," teases Diego. Boneta also tells us that his song, "Siempre Tu," which was featured in the season finale of "90210" where Diego plays Ade's boy-toy Javier, will also play a role in a sexy scene on "Liars." "The scene is an awesome scene. I'm basically working overnight at the country club ... I'm chopping some vegetables and sauteing and cooking and Spencer's there kinda helping me out. My song is playing in the background ... and Alex grabs Spencer and they start ... salsa dancing to the music. It's a very sexy scene and I hope you guys like it." Diego also confessed off camera that Troian Bellisario, who plays his character's love interest Spencer, was nervous about salsa dancing but that she can move really well. We can't wait to see it, Diego! "Pretty Little Liars" airs Tuesday nights at 8 p.m. ET on ABC Family.